/*
 * Copyright (c) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup kernel_generic
 * @{
 */

/**
 * @file
 * @brief Userspace bootstrap thread.
 *
 * This file contains uinit kernel thread wich is used to start every
 * userspace thread including threads created by SYS_THREAD_CREATE syscall.
 *
 * @see SYS_THREAD_CREATE
 */

#include <main/uinit.h>
#include <typedefs.h>
#include <proc/thread.h>
#include <userspace.h>
#include <stdlib.h>
#include <arch.h>
#include <udebug/udebug.h>

/** Thread used to bring up userspace thread.
 *
 * @param arg Pointer to structure containing userspace entry and stack
 *     addresses.
 */
void uinit(void *arg)
{
#ifdef CONFIG_UDEBUG
	udebug_stoppable_end();
#endif

	uinit_arg_t *uarg = arg;
	sysarg_t pc = uarg->pc;
	sysarg_t sp = uarg->sp;
	free(uarg);

	userspace(pc, sp);
}

/** @}
 */
